So, this is kind of and oldie but a goodie.

Some guy has a website running the AC OST on loop throughout the day. I actually stuck to it for a couple weeks straight - now I go back once in a while. Waking up to the 7AM/8AM music is pretty awesome.

One drawback - it loops, but not perfectly. Rather it plays the 15min video, then reloads the page. It will update on the hour, though.

That's brilliant! I'll have to check it out for some background music during the workday.